Pressure algometry is a suitable tool to assess anterior knee pain in osteoarthritic patients
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ORIGINAL ARTICLE • KNEE - ARTHRITIS
Pressure algometry is a suitable tool to assess anterior knee pain in osteoarthritic patients Pedro Hinarejos1 · Nerea Goicoechea1 · Mauricio Gidi1 · Joan Leal‑Blanquet1 · Raul Torres‑Claramunt1 · Juan Sánchez‑Soler1 · Joan Carles Monllau1 Received: 31 October 2018 / Accepted: 30 January 2019 © Springer-Verlag France SAS, part of Springer Nature 2019
Abstract Purpose Anterior knee pain is a frequent symptom in the osteoarthritic knee. Its intensity has been classically evaluated by the visual analogic score (VAS). The main objective of the study was to assess whether pressure algometry (PA) can be used as a reliable tool to quantify anterior pain in the osteoarthritic knee. Methods A prospective study was designed, including 160 patients scheduled for unilateral total knee arthroplasty. Patellar pain and function were evaluated according to a specific patellofemoral pain questionnaire and the Knee Society Score. Patients were asked about their pain at rest, while walking and in the stairs with the VAS score. PA by an algometer was used in the anterior part of the patella to determine the pressure pain threshold (PPT): the minimal pressure when the patient feels a painful sensation. Results The mean values of PPT were 385.1 kPa in the knees going to be operated and 403.4 kPa in the contralateral knees (p
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